What's the difference between r17 and zr17?

ZR basically means the tyre is adapted for speeds above 149 mph. ZR tyres includes the speed ratings V(149mph), W(168mph) and Y(186mph). Before 1990, the manufacturers used "ZR" to mean high performance tyres before the ratings got refined with W, Y…

What does zr17 mean on a tire?

The letters ZR on the sidewall relate to a tyre's speed rating, which in this case is 150mph. That means it should not be driven at speeds in excess of 150mph (240kmph) - of course, where such speeds are even legal! Before 1990, ZR was used for high-performance tyres.

Can I use ZR tires instead of R?

R indicates that the structure is RADIAL. So, VR indicates that the tyre has a RADIAL structure and a speed index equal to V. There is therefore no difference between a ZR or an R tyre with the same speed index.

Do I need ZR tires?

Tires with a maximum speed capability higher than 300 km/h (186 mph), require a "ZR" in the size designation. Consult the tire manufacturer for maximum speed when there is no service description.

What does Zr mean on Michelin tyres?

ZR is a category of speed rating. It was first introduced for speeds over 150mph. Since then car speeds have increased beyond what was believed to be the maximum required. With cars capable of going faster than 150mph, ZR was subdivided into Y, W and the original Z.

Low and High profile tire + Wide and Narrow tire - Effects on Performance

Are ZR tires good for winter?

NO, the rubber will be hard as a rock at low temp, and the rubber compound is hydrophobic, vs. hydrolphilic (I may have that reversed). Summer tires are crap in the winter, winter tires are crap in the summer, all season tires are crap all the time. great post.

Are ZR tires run flat?

All ZRtyres locations carry a massive range of Run-flat tyres in stock for all popular makes and model of cars, as well as having the correct tyre fitting and balancing equipment to fit these specialist tyres correctly without damage.

How do you read a tire size ZR?

What does 35 Zr mean on a tire?

This means the tire's sidewall is 35 percent of the tread's width, which calculates to 82.25 mm for the tire shown. Finally, the 20 represents the wheel diameter in inches, which means this particular tire is made for a 20-inch wheel. What about the ZR? Looking at the R first, it represents the construction.

What speed are Z rated tires good for?

SPEED RATING Z

A “Z” rating can mean different things. While it nearly always means a high performance tire for high-performing sports cars, “Z” may actually appear in the middle of a tire's size information. When it does, it represents either a maximum speed of more than 149 mph (240 kph) or 186 mph (300 kph).

How fast can a ZR tire go?

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For tires having a maximum speed capability above 240 km/h (149 mph), a “ZR” may appear in the size designation. For tires having a maximum speed capability above 300 km/h (186 mph), a “ZR” must appear in the size designation.

What is the Z in tyre size?

Some manufacturers will insert a “Z” in the middle of the tire size description (right after the aspect ratio) when the tire is rated at “W” or “Y.” And if a tire is rated in excess of 186 mph (300 kph), manufacturer's usually will list a “Z” within the size description, per industry standards.

What does R mean on a tire size?

“R” stands for the construction method of the tire indicating the tire is a radial tire. The following two numbers (16) indicate the diameter of the wheel rim in inches. The next two or three numbers (94) indicate the load index of the tire. In the example, 94 means the tire can carry 670kg.

What does Y and W mean on tyres?

Z-rated high-performance tyres are rated for speeds in excess of 149mph. Confusingly, W-rated tyres are rated at a higher speed in excess of 168mph. Y-rated tyres are rated in excess of 186mph. See the full list below. Tyre speed ratings should be matched to the official top speed of your car.

What does 55 W mean on motorcycle tires?

In this case the '58' denotes that the tyre is rated for a maximum carrying weight of 236kg at maximum pressure. The “W” represents the maximum speed for the tyre when it is correctly inflated and being used under load, in this case 270km/h.

What does W mean on tyres?

The speed rating is displayed on the tyre's sidewall, after the load rating. In this example, the car's speed rating is W, which indicates that it has been legally approved for use up to 168 mph.

What's the difference between 95y and 95w?

95 is like 1500lb load rating per tire. W is 168mph roll rate limit Y is 186mph.

What does 95y mean on tires?

The number is the load index. The higher the number, the more weight the tires can handle. In this case, "96" means the tire can handle 1,565 pounds, while the "Y" indicates the tire is rated to be safe at speeds up to 186 miles per hour.

How much difference in tire size is acceptable?

When changing tire sizes, we recommend staying within 3% of the diameter/height of the original tire. Any more than this and you face the risk of brake failure.

Does width of tire matter?

The tire width will affect their price and several other characteristics, such as grip, noise level, driving comfort, and appearance. Replacing narrow tires with wider ones will usually increase rolling resistance and, therefore, slightly increase fuel consumption.

Are Kumho tires any good?

Kumho is best for high-performance and all-season models. The tire manufacturer delivers fuel-efficient, technologically advanced designs without sacrificing affordability. It may not be the best for winter or all-terrain tire buyers, but Kumho is a reputable tire company otherwise.

Is Michelin ZR run-flat?

Michelin - ZP

Michelin integrated their ZP (Zero Pressure) run flat technology to existing tyre models in order to enhance their performance.

Do all BMW have run-flat tires?

Nearly every BMW vehicle comes standard with run-flat tires, which allow you to drive on a flat for up to 50 miles. One of the biggest advantages of run-flat tires is not having to change a tire on the side of the road in your nice clothes.

Do I have to have run-flats on my BMW?

If you're looking for the quick and easy response to that question, the answer is: “Yes, you can use regular tires on your run-flat-equipped BMW.” Of course, there are benefits and drawbacks of regular tires as well as run-flat tires, and we want to help you make the decision that best suits your needs.